Conversion Rates & Times

50% of users who are going to buy something from you do it within 28 minutes, according to research completed on one-million Google Adwords/Yahoo Search clicks. The other half of the conversions take some time - another 40% happen within 9 days, another 5% in days 10-12, and it takes a month before the last 5% of conversions even start to occur.

This useful information comes from Dr. Alan Rimm-Kaufman via Jacob Nielson's useit.com. 85% of the participants were consumer sites, 15% B2B. The article is worth a read, and includes some recommendations on how to use this data to make some smart changes to your site.